- ultrasonic waves, used in medical and dental diagnosis and therapy, in cleaning and detecting flaws in metal, etc.
- Radiology the use of ultrasonic waves in ultrasonography to form images of interior bodily organs, as the uterus or heart
A woman has an ultrasound of her thyroid.
The definition of ultrasound is a medical process that uses sound waves through a medical instrument to obtain images of internal organs.
An example of ultrasound is the technology used to get images of an unborn baby.
- Ultrasonic sound.
- a. The use of ultrasonic waves for diagnostic or therapeutic purposes, specifically to image an internal body structure, monitor a developing fetus, or generate localized deep heat to the tissues.b. An image produced by ultrasound.
- Sound whose frequency is above the upper limit of the range of human hearing (approximately 20 kilohertz).
- An image produced by ultrasonography.
- ultrasonic (ŭlˌ◌trə-sŏnˌ◌ĭk)
A Closer Look Many people use simple ultrasound generators. Dog whistles, for example, produce tones that dogs can hear but that are too high to be heard by humans. Sound whose frequency is higher than the upper end of the normal range of human hearing (higher than about 20,000 hertz) is called ultrasound. (Sound at frequencies too low to be audible—about 20 hertz or lower—is called infrasound.) Medical ultrasound images, such as those of a fetus in the womb, are made by directing ultrasonic waves into the body, where they bounce off internal organs and other objects and are reflected back to a detector. Ultrasound imaging, also known as ultrasonography, is particularly useful in conditions such as pregnancy, when x-rays can be harmful. Because ultrasonic waves have very short wavelengths, they interact with very small objects and thus provide images with high resolution. For this reason ultrasound is also used in some microscopes. Ultrasound can also be used to focus large amounts of energy into very small spaces by aiming multiple ultrasonic beams in such a way that the waves are in phase at one precise location, making it possible, for example, to break up kidney stones without surgical incision and without disturbing surrounding tissue. Ultrasound's industrial uses include measuring thicknesses of materials, testing for structural defects, welding, and aquatic sonar.
ultrasound - Computer Definition
ultrasound - Medical Definition
- Ultrasonic sound.
- The use of ultrasonic waves for diagnostic or therapeutic purposes, specifically to image an internal body structure, monitor a developing fetus, or generate localized deep heat to the tissues.
- An image produced by ultrasound.
- Between 10 and 14 weeks of pregnancy, physicians may use an ultrasound to look for a thickness at the nuchal translucency, a pocket of fluid in back of the embryo's neck, which may indicate a cardiac defect in 55 percent of cases.
- You'll have a second ultrasound to check the baby's development (and gender if you're interested), and some women have amniocentesis performed if there is any reason to believe that something may be amiss with the developing fetus.
- There are no complications per se from the tests themselves with the exception of unfavorable test results or supine (lying horizontality on the back) hypotension secondary to a pregnant woman lying on her back for an ultrasound.
- When OI occurs as a new dominant mutation and is found inadvertently on ultrasound, it may be difficult to confirm the diagnosis until after delivery since other genetic conditions can cause bowing and/or fractures prenatally.
- The decision to have prenatal surgery is made on the basis of detailed ultrasound imaging of the fetus, including an echocardiogram that uses ultrasound to obtain images of the fetal heart, as well as other diagnostic tools.